walther



3 Sheets-Sheet 1.

(No Model.)

R. & H. WALTHER.

ELECTRIC ARG LAMP.

No. 338,122. Patented Mar. 16, 1886.

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I m %CW 'W I j W IIIII 3 Sheets-Sheet Z.

(No Model.)

R. & H. WALTHER.

ELECTRIC ARO LAMP.

No. 338,122. Patented Mar. 16, 1886.

(No Model.) 3 Sheets-Sheet 3. R. & H. WALTHER.

ELECTRIC ARC LAMP.

N0. 338,122. Patented Mar. 16, 1886.

UNITED STATES RICHARD IVALTHER AND HUGO IVALTHER, OF \VERDAU,

GERMANY.

PATENT ()EEIQE.

SAXONY,

ELECTRIC-ARC LAMP.

fiPEClFICATION forming part of Letters Patent No. 338,122, dated March 16, 1886.

Application filed July 15, 1885. Serial No. 171,669. (No model.)

To aZZ whom it may concern:

Be it known that we, RICHARD WALTHEE and HUGO IVALTHER, of \Verdau, Saxony, Germany, have invented a new and Improved Electric-Arc Lamp, of which the following specification is a full, clear, and exact de scription.

This invention relates to an electric arc lamp; and has for its object to obtain a steady light, the regulation of the are being produced directly by the current itself. The current influences one or two solenoidal cores in such a way that they are attracted to a greater or less degree, and are thus drawn into or out of the solenoidal coil. This motion is trans mitted to lever mechanism that lifts or lowers the carbon-holder, as will be hereinafter described.

In the accompanying drawings, Figure I is a face View of our improved lamp. Fig. II is a side view of the same. Fig. III is a top view, and Fig. IVa horizontal section on line :0 1, Fig. I. Figs. V to VIII are detail views of various parts thereof.

In the drawings the letter F represents a magnetic brake that prevents the cores to Z) of the solenoid from dropping out of their coils A B too readily. This brake is composed of the shoes ef,Figs.II and III,which are placed at a proper distance from the cores a b, so as to effect the magnetic braking of the latter. The shoes are provided with adjusting mechanism, (see Fig. 1,) by means of which they may be placed nearer to or farther away from the cores, and thus the brake may be made to act with greater or less power. The current branches off at 0, passes through the solenoid A B, reunites at d, and is conducted to the upper carbon by means of its tube 0. Thence it passes to the lower carbon, and leaves the lamp at g. The current causes the regulation of the are by attraction of the cores, and a con sequent movement of rod h in conjunction with the brake, which acts by reason of the attraction of the cores 0/ 1) upon the shoes 6 f. 4 5

hen the lamp is ignited, the carbons are placed with their ends upon each other. The current draws the cores into the coils, and thus the tube or holder of the upper carbon is raised by means of rod h and tongue 1' of a le ver, 70, so that the carbon points are placed at a normal distance from one another. -When the carbons are consumed, the current is decreased, and the cores to b will drop. The

tongue 2' liberates the tube 0 so that the latter A This lowering of tube 0 takes may descend. place without any irregularity and almost imperceptibly, as the current by increasing in strength immediately produces an equalization upon cores (6 b, brake E, rod h, and levers t 7.. The cores move freely within the coils and their descent is produced by the brakein such a way that the attraction of the cores by the current is in proper relation to the normal force of the current. In this way the current regulates the are. promptly without the use of branching conductors.

The lamp may be fitted for various purposes, and may have a stationary or an adjustable illuminatingpoint.

l/Ve claim as our invention The combination of an electric arc lamp having solenoids A B and cores to b with rod h, lever 7t, tongue t, and with the magnetic brake-shoes e f, adapted to be placed nearer to or farther away from the cores a Z), substantially as specified.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

RICHARD WALTHER. HUGO WALTI-IER. Witnesses:

EDMUND BAOH, O'r'ro GUNTnEn. 

